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$341+ Cheap flights from Sofia (SOF) to Boston (BOS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/10. Fares are subject to change and may not be available on all flights or dates of travel.
SOF — BOS
Jul 23 — Jul 301
Thu 7/23
Thu 7/30
1 adult, Economy
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Cheap flight deals from Sofia to Boston

Cheapest flights from Sofia to Boston
Explore the most affordable flight options available from Sofia to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 23, 2026.

This Iberia deal was found by Cheapflights users on 6/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/222:30 pm
SOF
-
BOS
1 stop14h 20m
Multiple Airlines
Sun 3/218:15 pm
BOS
-
SOF
1 stop14h 05m
Multiple Airlines
Deal found 6/22$709
This British Airways deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/189:00 pm
SOF
-
BOS
1 stop29h 40m
British Airways
Fri 11/277:30 am
BOS
-
SOF
1 stop20h 45m
British Airways
Deal found 6/21$719
This British Airways deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/189:00 pm
SOF
-
BOS
1 stop29h 40m
British Airways
Tue 11/2412:03 pm
BOS
-
SOF
2 stops25h 07m
British Airways
Deal found 6/21$720
This United Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:25 am
SOF
-
BOS
1 stop14h 20m
United Airlines
Fri 11/2710:30 am
BOS
-
SOF
2 stops19h 45m
United Airlines
Deal found 6/21$723
This United Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:25 am
SOF
-
BOS
1 stop14h 20m
United Airlines
Tue 11/2410:30 am
BOS
-
SOF
2 stops19h 45m
United Airlines
Deal found 6/21$724
This British Airways deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/2112:05 pm
SOF
-
BOS
2 stops34h 17m
British Airways
Sat 11/2812:03 pm
BOS
-
SOF
2 stops17h 57m
British Airways
Deal found 6/21$725
This United Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:25 am
SOF
-
BOS
2 stops15h 12m
United Airlines
Sat 11/281:30 pm
BOS
-
SOF
2 stops16h 45m
United Airlines
Deal found 6/21$726
This United Airlines deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:25 am
SOF
-
BOS
2 stops17h 32m
United Airlines
Thu 11/261:30 pm
BOS
-
SOF
2 stops16h 55m
United Airlines
Deal found 6/21$727
This Air Canada deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:25 am
SOF
-
BOS
2 stops34h 12m
Air Canada
Wed 11/255:30 am
BOS
-
SOF
2 stops24h 45m
Air Canada
Deal found 6/21$729
This Bravofly deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/219:10 pm
SOF
-
BOS
1 stop29h 45m
Turkish Airlines
Thu 8/279:50 pm
BOS
-
SOF
1 stop15h 30m
Turkish Airlines
Deal found 6/21$734
This KLM deal was found by Cheapflights users on 6/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/207:00 am
SOF
-
BOS
1 stop13h 25m
KLM
Wed 11/251:10 pm
BOS
-
SOF
2 stops17h 55m
KLM
Deal found 6/21$739

Find flight deals from Sofia to Boston

Discover tips and strategies to find the most affordable flight options for your journey from Sofia (SOF) to Boston (BOS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated June 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$709
(Iberia)

One-way from

$341
(Kiwi.com)

Popular in

May

Cheapest in

November

Average price

$739
Provider with most accurate pricing for Sofia-Boston Logan Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Sofia-Boston Logan Intl flights.
Search Deals
From Sofia to Boston Logan Intl
Search Deals
One-way flight from Sofia to Boston Logan Intl
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Sofia to Boston that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 23, 2026.
Use the filters below to find and compare flights from Sofia to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Sun 11/22

2:30 pm-9:50 pm

1 stop14h 20m

Boston Logan Intl

Sun 3/21

8:15 pm-4:20 pm

1 stop14h 05m

$709

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Wed 11/18

9:00 pm-7:40 pm

1 stop29h 40m

Boston Logan Intl

Fri 11/27

7:30 am-11:15 am

1 stop20h 45m

$719

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Fri 11/20

6:25 am-1:45 pm

1 stop14h 20m

Boston Logan Intl

Sun 11/29

8:40 pm-6:20 pm

1 stop14h 40m

$723

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Thu 11/19

6:25 am-1:45 pm

1 stop14h 20m

Boston Logan Intl

Sat 11/28

1:30 pm-1:15 pm

2 stops16h 45m

$723

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Tue 11/17

6:25 am-2:37 pm

2 stops15h 12m

Boston Logan Intl

Mon 11/23

12:02 pm-6:20 pm

2 stops23h 18m

$726

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Mon 7/20

9:10 pm-7:55 pm

1 stop29h 45m

Boston Logan Intl

Wed 8/12

9:50 pm-11:45 am

1 stop30h 55m

$780

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Thu 7/2

6:30 am-3:40 pm

1 stop16h 10m

Boston Logan Intl

Mon 9/7

8:05 pm-11:15 pm

1 stop20h 10m

$782

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Mon 7/27

6:20 am-3:40 pm

1 stop16h 20m

Boston Logan Intl

Tue 8/11

8:05 pm-11:15 pm

1 stop20h 10m

$782
Quickest round-trip

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Sat 7/4

2:00 pm-8:10 pm

1 stop13h 10m

Boston Logan Intl

Tue 9/8

2:28 pm-12:10 pm

2 stops14h 42m

$787
Cheapest one-way

SofiaBoston

SOF - BOS

SOFBOS

Sofia

Mon 9/14

11:45 am-6:50 pm

3 stops38h 05m

$437

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/20

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Compare providers for flights from Sofia to Boston

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Sofia to Boston in June.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Sofia-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Sofia-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Sofia-Boston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Sofia-Boston flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Sofia-Boston flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Sofia to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from Sofia with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Sofia to Boston

How far ahead should I book a flight from Sofia to Boston?

The price you pay for your flight from Sofia to Boston may vary depending on when you book. For the best chance of a lower fare, look to book 36 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Sofia to Boston?

Currently, November is the cheapest month in which you can book a flight from Sofia to Boston (average of $675). Flying from Sofia to Boston in May is currently the most expensive (average of $961). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Sofia to Boston?

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Boston. Reviews last updated June 23, 2026.
Read reviews from past customers who have flown KLM,Austrian Airlines, andTurkish Airlines from Sofia to Boston. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,530 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
KLM
7.8
Good
1,530 reviews
KLM
7.8
Good
1,530 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Austrian Airlines
7.6
Good
938 reviews
KLM
7.8
Good
1,530 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Turkish Airlines
7.4
Good
4,407 reviews
KLM
7.8
Good
1,530 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
United Airlines
7.4
Good
9,873 reviews
KLM
7.8
Good
1,530 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful
Lufthansa
6.8
Okay
8,086 reviews
KLM
7.8
Good
1,530 reviews

Food

7.3

Boarding

7.8

Crew

8.4

Comfort

7.7

Entertainment

7.2

Overall

7.8

Reviews

1 / 20
6.0
Good

Anonymous,Apr 2026

OKC - ATL

Flight was ok - difficult as I had seat next to bathroom.. Food awful

Related info for your journey

Find useful and relevant information for your journey from Sofia to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Sofia to Boston?

    British Airways and United Airlines can get you from Sofia to Boston in just under 14h 20m. Your travel time can differ by up to 15h 20m. There are 4521 mi between Sofia and Boston. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Sofia to Boston round-trip?

    Austrian Airlines, at $590, was found to be the cheapest airline from Sofia to Boston.Alternate airlines to your destination round-trip include KLM and United Airlines. Austrian Airlines is priced at 26% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Sofia to Boston one-way?

    The cheapest airline one-way is SWISS, with whom users have recently found tickets for as low as $593. However, be on the lookout for offers from Lufthansa and Turkish Airlines, as they are both options that can get you from Sofia to Boston for a low price.

  • Can I find deals for flights from Sofia to Boston that include hotel bookings?

    Yes. In addition to deals on Sofia to Boston flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Sofia to Boston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Sofia to Boston.

  • Can I find deals for business class flights from Sofia to Boston?

    Yes. Cheapflights offers flight deals from Sofia to Boston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Sofia to Boston?

    Currently, November is the cheapest month in which you can book a flight from Sofia to Boston (average of $675). Flying from Sofia to Boston in May is currently the most expensive (average of $961). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Waltham
Cambridge
Concord
Brockton
Watertown
Hampton Beach
Seekonk
Cranston
Warwick
Peabody
Auburn
Fitchburg
York Beach
Chelsea
Londonderry
Dedham
Swansea
Lowell
Smithfield
Braintree

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Sofia to Boston

Discover the top 6 airlines that operate flights from Sofia to Boston. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
Austrian AirlinesCheapest$590Average$804FlexibilityNo cancel feeOn-time78%
KLMCheapest$592Average$785FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$649Average$786FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$651Average$749FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$658Average$795FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$682Average$833FlexibilityNo cancel feeOn-time77%

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